How much work is done by a person pushing a cart 20 meters with a force of 50n 8: an electric hoist does 500 joules of work lifting a box 2 meters, how much force does the hoist use if you push on a solid brick wall with a force of 100n how much work is done.

W = force x distance

50 N x 20 m = 1,000 joules

For the first answer.

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.